An Analysis of Functional Gradient Materials by Molecular Dynamics Method

Abstract

Various kinds of Functional Gradient Materials (FGM) have been developing, and many investigators have been studying in order to develop an analysis method. It is difficult to analyze FGM comparing with ordinal alloy, because mechanical properties of FGM are changing along its gradient direction. Usually, mechanical properties of FGM are decided by using the function with respect to volume mixture ratio. Such the functions were obtained by experimental methods for an alloy. Thus, accuracy of these functions are unknown when we use them in the case of designing a new FGM. Moreover, it is very difficult to obtain mechanical properties of FGM by experiments. Consequently, it is important to develop a new analysis method. On the other hand, Molecular Dynamics (MD) is one of the important simulation technique, when we struggle atom older structures. If we know only the kinds of material, we can simulate any behavior of the material as same as experimental method.